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Biomedical subjects

E Weinberg

Publications and source records attributed to E Weinberg.

At least 55 records · Page 3Linked to original sources
PubMed1979

[The influence of direct electric current on bone formation (author's transl)].

The authors have studied the effects of a 20 microampere current applied to bone in rabbits and dogs. The results have been analysed according to the age of animal, whether mature or immature, and the nature of the electrode (whether steel or platinum). They found no different in the osteogenesis produced in the medullary canal which was constant. The authors further studied the effects of currents on osteotomies of the radius in dogs which generally led to non-union in the absence of electrical currents. They failed to demonstrate any stimulation of bone repair by the current. They conclude that bone formation in the medullary canal of intact bones and the repair of fractures are two different processes.

Age Factors↗
PubMed1978

Performance of United States citizens with foreign medical education on standardized medical examinations.

To enter the mainstream of American medicine, United States students who enroll in foreign medical schools must either transfer to a United States medical school (usually after passing Part I of the NMBE examination) or complete their studies abroad and then pass FLEX and usually ECFMG examinations. Half those applying for transfer fail Part I. Although virtually all who succeed in transferring subsequently pass Parts II and III, their scores are below the mean of the reference group, and their relative performance progressively deteriorates. Sixty per cent of USFMG's fail the medical portion of the ECFMG examination as compared to an expected failure rate for United States medical students of only 2 to 3 per cent. Thirty-eight per cent of USFMG's who take both ECFMG and FLEX examinations fail the latter. The mean weighted score for USFMG's on FLEX is 75.8, while that for United States graduates is 80.1 and for FMG's 74.7. These preliminary data suggest that United States students who go abroad, regardless of where they complete their studies, do not perform as well on standard tests after they return home as do those who have had their entire education in United States schools. This question needs more systematic study.

Education, Medical↗
PubMed1975

Oncornavirus-like particles released from arginine-deprived human lymphoblastoid cell lines.

Type-C RNA tumor virus particles were released from three different human lymphoblastoid cell lines after incubation in arginine-deficient medium. The released virus-like particles were characterized by (a) their ability to band in sucrose gradients at a density of 1.16-1.18 g/ml; (b) the presence of an RNA-directed DNA polymerase activity resembling that of the oncornaviruses; and (c) isolation of cores that band at a density of 1.26-1.27 g/ml in sucrose gradients. Examination of the arginine-deprived human lymphoblastoid cell line strain P3HR-1 by electron microscopy revealed the presence of C-type particles in the intracellular spaces.

Arginine↗
PubMed1974

Isolation and some properties of the genes coding for histone proteins.

The DNA coding for histone proteins, together with the intervening spacer DNA, has been isolated from the sea urchin, Psammechinus miliaris, by repeated centrifugation on CsCl-asctinomycin gradients. The biophysical data show that a major portion of the spacer is 37% G+C and very divergent in sequence, while the DNA segments coding for histone proteins are high in G+C and have diverged to a lesser extent within the species.

Animals↗